1/* Copyright (C) 2002 Free Software Foundation. 2 3 Test strcpy with various combinations of pointer alignments and lengths to 4 make sure any optimizations in the library are correct. */ 5 6#include <string.h> 7 8#ifndef MAX_OFFSET 9#define MAX_OFFSET (sizeof (long long)) 10#endif 11 12#ifndef MAX_COPY 13#define MAX_COPY (10 * sizeof (long long)) 14#endif 15 16#ifndef MAX_EXTRA 17#define MAX_EXTRA (sizeof (long long)) 18#endif 19 20#define MAX_LENGTH (MAX_OFFSET + MAX_COPY + 1 + MAX_EXTRA) 21 22/* Use a sequence length that is not divisible by two, to make it more 23 likely to detect when words are mixed up. */ 24#define SEQUENCE_LENGTH 31 25 26static union { 27 char buf[MAX_LENGTH]; 28 long long align_int; 29 long double align_fp; 30} u1, u2; 31 32main () 33{ 34 int off1, off2, len, i; 35 char *p, *q, c; 36 37 for (off1 = 0; off1 < MAX_OFFSET; off1++) 38 for (off2 = 0; off2 < MAX_OFFSET; off2++) 39 for (len = 1; len < MAX_COPY; len++) 40 { 41 for (i = 0, c = 'A'; i < MAX_LENGTH; i++, c++) 42 { 43 u1.buf[i] = 'a'; 44 if (c >= 'A' + SEQUENCE_LENGTH) 45 c = 'A'; 46 u2.buf[i] = c; 47 } 48 u2.buf[off2 + len] = '\0'; 49 50 p = strcpy (u1.buf + off1, u2.buf + off2); 51 if (p != u1.buf + off1) 52 abort (); 53 54 q = u1.buf; 55 for (i = 0; i < off1; i++, q++) 56 if (*q != 'a') 57 abort (); 58 59 for (i = 0, c = 'A' + off2; i < len; i++, q++, c++) 60 { 61 if (c >= 'A' + SEQUENCE_LENGTH) 62 c = 'A'; 63 if (*q != c) 64 abort (); 65 } 66 67 if (*q++ != '\0') 68 abort (); 69 for (i = 0; i < MAX_EXTRA; i++, q++) 70 if (*q != 'a') 71 abort (); 72 } 73 74 exit (0); 75} 76